I just got my halogen headlights converted using a MTEC 6000k HID Kit and all I have to say is WOW.
1. No flicker
2. No onboard computer warning
3. No visible light scattering
4. Clear cutoff
5. No loss of any headlight functionality i.e. auto setting, high beams etc.
Best of all, it was truly plug and play with no drilling, splicing, or electrical modifications. Apparently the hardest part was finding a place to mount the ballast unit.
I highly recommend this kit to anyone who is interested in the conversion.
I'll post better pictures later tonight as all I have with me is my phone camera.